Of the finger blood glucose and venous blood glucose, venous blood glucose meets the current clinical diagnostic criteria and is more accurate, but both have their own clinical uses. Finger blood glucose is the blood glucose measured from the blood taken from the tip of the finger after it has been pricked, while venous blood glucose is the blood glucose in the vein. The current clinical diagnostic criteria for diabetes are based on venous blood glucose, so venous blood glucose is more accurate for clinical diagnosis, but venous blood glucose is not a substitute for finger blood glucose. The clinical roles of venous blood glucose and finger blood glucose are different. Venous blood glucose plays an important role in diagnosis and is more accurate in diagnosing diabetes and other diseases. Finger blood glucose is convenient and suitable for daily testing. It can be tested by pricking the fingertip, which is easy to operate and more efficient. Finger blood glucose and venous blood glucose have their own advantages and disadvantages and are recommended to be used in combination.